Quote:
Originally Posted by KohKohPuffs
Oh right, when I was in 115, we started out with one 775 and I believe a 1:100 reduction, and that was barely able to lift up 6 stacks. Although I calculated my scenario to do the job in 3 seconds (the main bot stacks much faster).
As for voltage... I never considered that actually  . If it's a 10 gauge wire it's going to be bulky... and that means more weight. I guess I can remove the can burglars if I'm going to add this with the main bot. |
Depends on the pulley diameter. We used a 1.06" diameter pulley with 2 RS-775s at a 21:1 reduction to get optimal speed on 6 totes, and that with a very long lever arm adding friction. 254's lift on slightly smaller pulleys was 2 775s on ~12.5:1 reduction and was very fast, due to the much lower friction/ smaller lever arm.
A single 775 going to a similar pulley would only need maybe a 50:1 reduction even with a long lever arm. If you place it nicely you could get away with a 25:1 or 30:1 reduction.
You said you are using servos to hold the totes; why not just use the arm? FRC-legal servos are very weak.